Three-dimensional printer



FIG. 1 is a perspective view of a three-dimensional printer according to the present invention;

FIG. 2 is a top view of the three-dimensional printer of FIG. 1;

FIG. 3 is a rear view of the three-dimensional printer of FIG. 1;

FIG. 4 is a front view of the three-dimensional printer of FIG. 1; and,

FIG. 5 is a left side view of the three-dimensional printer of FIG. 1, the right side is identical to the left side shown.

The broken lines are for illustration only and form no part of the claimed design. 

CLAIM What is claimed is, the ornamental design for a three-dimensional printer, as shown and described. 